Summaryinfo

A vulnerability classified as critical was found in QEMU up to 2.12.0. Affected by this vulnerability is the function iscsi_co_block_status of the component iSCSI Block Driver. The manipulation leads to heap-based overflow. This vulnerability is known as CVE-2020-1711. The attack can be launched remotely. There is no exploit available. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability classified as critical has been found in QEMU up to 2.12.0 (Virtualization Software). Affected is the function iscsi_co_block_status of the component iSCSI Block Driver. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.x.x up to and including 2.12.0 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.

The weakness was published 02/11/2020 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2020-1711 since 11/27/2019. It is possible to launch the attack remotely. Required for exploitation is a authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/15/2024).

The vulnerability scanner Nessus provides a plugin with the ID 208583 (CentOS 7 : qemu-kvm-ma (RHSA-2020:1150)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (208583). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Virtualization Software

Name

• QEMU

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
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CPE 2.2info

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• 🔍
• 🔍

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